Sliding door lock



May 8, 1956 Filed March 27, 1953 J. C. LABRIE SLIDING DOOR LOCK 2 Sheets-Sheet l Fig. 5

Joseph C. Labr/e INVENTOR.

BY Mm May 8, 1956 J. c. LABRIE 2,744,406

SLIDING DOOR LOCK Filed March 27, 1953 2 Sheets-Sheet 2 64 I34 Fig.4

s /36 J seph 6. Labrie INVENTOR.

SLIDING DOOR LOCK Joseph C. Labrie, Miami, Fla.

Application March 27, 1953, Serial No. 345,075

2 Claims. 7 (CI. 70-96) This invention relates generally to door lock mechanisms and pertains more particularly to an improved lock mechanism for sliding doors.

A primary object of this invention is to provide an improved form of lock construction for sliding doors which incorporates a plurality of interengaging and interlocking parts.

Another object of this invention is to provide an improved form of lock mechanism which incorporates both a key controlled and manually controlled locking assembly, each incorporating interengaging mechanism for cooperative actuation.

United States Patent Another object of this invention is to provide. a locking mechanism which includes a latching element which serves to maintain the key controlled lock in proper position. t

Another object of this invention is to provide a locking mechanism which includes a latching element and a bolt actuating cam, the element serving to maintain the cam in proper position on the lock mechanism.

Another object of this invention is to provide a locking mechanism for sliding doors which is of extremely compact and economical design.

These together with other objects andadvantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to'the accompanying drawings forming a part hereof,wherein like numerals refer to like parts throughout, and in which:

Figure l is a perspective of a portion of a sliding door incorporating the novel locking mechanism;

Figure 2 is a vertical section taken through the sliding door and its adjacent casing showing details of the mechanism in the locked position;

Figure 3 is a vertical section taken substantially along the plane of section line 3-3 of Figure 5 showing details of the assembly in theunlocked position;

Figure 4 is a vertical section similar to that of Figure 2 but showing the relationship of parts of the mechanism showing details of the internal construction of the combined latching and locking mechanism;

Figure 6 is an exploded view of a portion of the assembly;

Figure 7 is another exploded view showingthe remainder of the assembly; and

Figure 8 is an exploded perspective View of a portion of the assembly including the key controlled cylinder and valve mechanism.

Referring now more particularly to Figures 1 and 2, reference numeral 10 indicates generally a sliding door which is movable toward and away from the door casing 12 which is provided with a mounting plate 14 including the horizontally extending hook 16. The door carries a face plate 18 below which is disposed a guide plate 20 recessed into the edges of the door as shown and these 2,744,406 Patented May 1956.-

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2 two plates are provided with registering apertures through which the hook 16 projects when the door is closed. A recess is provided in the door behind these plates and receives a pair of mating plates 22 and 24, see especially Figure 5,. which are provided with cooperating recesses receiving the dog 26 terminating at one end in a hook portion 28 for engagement with the hook 16 and which is pivoted intermediate its length by means of the pin 30. The door is provided with a transverse opening 32 into which the rearward end of the plates 22 and 24 as well as the rearward end of the dog project and each of the latterare provided with corresponding depressions 34 and 36 receiving the opposite ends of a compression spring 38 serving to normally urge the dog to the position shown in Figure 2. The rear corner 40 of the dog abuts against the inwardly directed flanges 42 on the plates 22 and 24 to serve as a limit stop for the dog and the upper face 44 adjacent this corner constitutes a cam surface as will presently appear. Also, the extreme rear end 46 of the dog constitutes a locking shoulder for the same which is selectively engageable by the sliding locking member 48 which is projectable into and out of locking engagement with the dog by virtue of its extended guide portion 50 received Within the corresponding recess 52 in the plates 22 and 24, the shoulder 54 being engageable under the rear end of the dog 46 and the member as a whole being moved as will presently appear by virtue of its ear 56 which also serves as a stop for limiting the projected position of this sliding member. The spring urged ball 53, of course, serves to maintain the sliding member in the desired position by virtue of its projection into one of the depressions 60.

As far as the operation of the above described assembly is concerned, the dog is moved from a latched to an unlat'ched position under action of the cam member 62 provided with the cam projection 64 engaging against the.

cam surface 44 of the dog, these two positions being shown most clearly in Figures 3 and 4. The sliding member 48 is movable between the locked and unlocked position as shown in Figures 2 and 3 respectively under engagement of its ear 56 with the oscillatable element 66.

Referring now more particularly to Figures 6 and 7, it will be seen that a pair of escutcheon plates, namely, an outer plate 70 and an inner plate .72 are provided on opposite sides of the door in covering relation to the opening therethrough and these escutcheons are provided with apertures 74 rotatably receiving the, opposite ends of a combined unlatching and locking mechanism. These escutcheons are secured to plates 22 and 24 by means'of suitable fasteners 63, those in the outer escutcheon being provided with smooth heads so that they cannot be removed from the outside of the door. This assembly includes a tubular outer member '76 of generally cylindrical configuration which is provided at diametrically opposed points with flats 78 which serve to featheran operating lever 80 thereon, the lever being provided with similarly configurated aperture .82. tion, this member first receives the lever 80 and is then projected through the opening 74on the escutcheon and a locking clip 84 is engaged Within a peripheral slot or groove 86 in the member which, in cooperation with the position on the escutcheon. A second tubular member 90 is provided'with flats 9 similar to those on the first member for feathering the inner operating lever 94 thereon, this member being provided with a collar 96 and a groove 98 cooperating with the clip 100 in securing the member and lever M to the escutcheon 72 in a manner similar to the other member.

The two members are provided with interfitting or interlocking inner ends so that rotation of one member will efiect rotation of the other and this interlocking cm In assembled operaradial flange 88 serve to maintain this member in proper 3 gazement is provided by a pair of diametrically oppose substantially rectangular extensions 102 on the front member 76 and a pair of circumferential extensions 104 and 106 on the second member 90, these pairs of extensions being disposed in right angular relation to each other for interlocking engagement. In this respect, it will be noted that the extension 104 is longer than the extension 106 so that the latter is slightly spaced from the lower end face 108 on the first member 76 to provide therebetween an elongated slot, see especially Figure 5. The previously described cam element 62 is provided with a central aperture 110 conforming to the shape of the outer surface of the members so that the cam element is carried and rotated thereby and this cam element is provided along its undersur-face with an elongated slot 112 which is positioned in register with the previously mentioned slot defined between the extension 106 and face 108 so that the previously described latch actuating element 66 which extends radially outwardly through these slots will properly position the cam element longitudinally of the member 76.

The members 76 and 90 present a housing having a longitudinal circular bore therethrough which rotatably receives the locking mechanism which will now be described. The first member 76 receives a lock barrel 114 which is controlled by a key 116 in a well known mannor to disengage the various tumblers 118 from corresponding recesses in the inner surface of the member 76, as is well known, so as to allow relative rotational movement between the barrel 114 and the member 76. The

barrel is provided with an extension 120 having an arcuate groove 122 which projects beyond the upper end face 124 of member 76 between the extension 102 and the annular rim 126 of oscillatable element 66 is seated within this groove 122 serving to maintain the barrel in proper position with respect to the member 76, the collar 128 of the barrel being removable to permit assembly.

The inner end of the lock assembly is provided with a manually actuated knob 130 and the cylindrical projection 132 on the knob is received Within the bore of member 90 as is the semi-circular extension 134 which, when the device is assembled, overlaps the extension 120 on the lock barrel. It is to be noted that the two extensions 120 and 134 mate in such a manner as to allow a certain amount of lost motion between the lock barrel 114 and the knob 130. The amount of lost motion provided is such as to permit the sliding locking member 48 to be moved between the locked and unlocked positions by manipulation of knob 130 without imparting any movement to the lock barrel. sliding locking member 48 is moved to the locked position by actuation of the lock barrel, the lost motion will permit the lock barrel to be returned to the normal position, wherein removal of the key can be accomplished, without disturbing the then locked position of the element 66 and consequently the member 48. Likewise, the same action takes place upon unlocking the assembly by means of the key 116, the lost motion permitting the lock barrel to be rotated back from the unlocking to the normal position, wherein the key may be removed from the barrel, without disturbing the then unlocked position of member 48. The extension 134 is provided with a depending key 136 which is received within the keyway 138 of the oscillatable element 66 so that rotation of'this knob assembly will transmit oscillatory motion to the oscillatable element, it being noted that the radially projecting car 140 on the oscillable element is disposed with in a corresponding notch 142 on the upper extension 104 of the first member 90 to provide a stop limit for the oscillatory motion of the oscillatable element. The de- At the same time, when the pending projection 143 extends outwardly through the previously mentioned slot between extension 106 and the face 108 and the slot 112 and its lower end is provided with a notch 144 which engages over the ear 56 of the sliding member 48. To maintain the knob assembly in assembled relation with respect to the member 90, the cylindrical portion 132 of the former is provided with an elongated slot 146 into which the pin 148 extending through aperture 150 in the member 90 projects, the pin being prevented from disengagement by virtue of its engagement with the inner surface of the aperture in the lever 94.

The operation of the device will now be apparent inasmuch as actuation of either of the levers or 94 will impart a rotational movement to the housing comprised of the members 76 and which will, in turn, impart a rotational movement to the cam assembly 62 to pivot the dog 26 to unlatch the door assembly. When it is desired to lock the same, it is merely necessary to rotate either the manual knob to impart rotary motion to the oscillatable element 66 or rotate the lock barrel 114 under action of the key 116 to accomplish the same result.

It will be noted that the locking device is extremely compact in design so that it may be easily incorporated in a door no matter how thin the latter may be constructed.

From the foregoing, the construction and operation of the device will be readily understood and further explanation is believed to be unnecessary. However, since numerous modifications and changes will readily occur to those skilled inthe art, it is not desired to limit the invention to the exact construction shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the appended claims.

What is claimed as new is as follows:

1. A combined locking and actuating assembly comprising a pair of coaxial tubular members provided with interfitting adjacent ends presenting an elongated housing, means for rotating said housing, a bolt actuating cam carried by said housing provided with a circumferential slot, locking means received in said housing including an element projecting from thehousing through the slot in said cam, said locking means including akey controlled barrel, said barrel having a groove within which said element is journalled, said locking means also including mechanism for imparting rotational movement of said barrel to said element.

2. Combined locking and actuating assembly as set forth in claim 1 wherein said means for rotating said housing includes actuating lever means operatively connected to opposite outer end portions of said tubular members and rotatable therewith for imparting rotational movement to the barrel and the element journaled therein.

References Cited in the file of thispatent UNITED STATES PATENTS 

